Oscillation criteria for second order nonlinear differential equations

Onose, Hiroshi

doi:10.1090/S0002-9939-1975-0369813-4

Oscillation criteria for second order nonlinear differential equations
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Proc. Amer. Math. Soc. 51 (1975), 67-73 Request permission

Abstract:

Oscillation criteria are given for the second order nonlinear equation $y''(t) + a(t)f(y(t)) = 0$, where the coefficient $a(t)$ is not assumed to be nonnegative for all large values of $t$. These results are concerned with the interesting recent ones of Wong’s paper.

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